Yi-su, a 37 year-old professor, can't forget her first love Joon-ho who's missing in action in Vietnam. She meets Hyun-woo one day, who look surprising like Joon-ho. Hyun-woo investigates Yi-su who lives in the past and discovers that her pain stems from the Vietnam war. Hyun-woo can't help falling in love with her even though he's a student. On a trip to Busan, he confesses his love for her. But he soon realizes that the only man for her is Joon-ho. Min-cheol who fought along with Joon-ho sells his belongings to Yi-su at a high price. He tells her that Joon-ho died in a fire and they argue aggressively. Min-cheol commits suicide afterwards and Yi-su is also found dead in the campus pool.

The Song of Crazy Love

Kang-wook, a law student at Seoul National University, finds himself in a tight spot financially after losing contact with his family in North Korea. He sells his own blood at a hospital to make ends meet, and there he meets and grows close to nurse Jin-young. As Kang-wook faces financial difficulties, Ki-yong, a son of a landlord's agent, appears and tricks Kang-wook into joining left-wing activities. Ki-yong's true identity is revealed by Yoon-ae, a friend from hometown, leading to his arrest. Meanwhile, Kang-wook and Jin-young marry with the blessings of Professor Park and their friends, while Kang-wook's friend Do-hyeon struggles to hide his feelings for Jin-young. Their sweet days together come to an end with the outbreak of the Korean War, separating them. Jin-young, unable to wait for Kang-wook any longer, decides to flee the war with Do-hyeon. Kang-wook, hiding at Yoon-ae's house, is eventually arrested by Ki-yong and the leftists, who had been freed from prison.